Front arch for furnaces.



No. 784,787. PATENTED MAR. 14, 1905.

J. H. FOOTE.

FRONT ARCH FOR FURNACES.

APPLICATION FILED JAN. 13. 1905.

2 SHEETS-SHEET l.

Nd. 784,737. PATENTED MAR. 14. 1905.

4 J. H. FOOTE.

FRONT ARCH FOR FURNACES. APPLICATION FILED JAN. 13. 1905.

2 SHEETS-SHEET 2.

&

- the grate and arch-blocks removed.

UNITED STATES Patented March 14, 1905.

PATENT OFFICE.

JOHN H. FOOTE, OF TROY, NEW YORK, ASSIGNOR TO HARVEY S. MoLEOD, OF TROY, NEW YORK.

FRONT ARCH FOR FURNACES.

SPECIFICATION forming part of Letters Patent No. 784,737, dated March 14, 1905.

' Application filed January 13, 1905'. Serial No. 240,914.

To all whom, it may concern.-

Be it known that 1, JOHN H. Foo'rE, a citizen of the United States, residing at Troy, county of Rensselaer, and State of New York, have invented certain new and useful Improvements in Front Arches for Furnaces, of which the following is a specification.

The invention relates to such improvements; and it consists of the novel construction and combination of parts hereinafter descri bed and subsequently claimed.

Reference may be had to the accompanying drawings,and the reference characters marked thereon, which form a part of this specification.

Similar characters refer to similar parts in the several figures.

Figure 1 of the drawings is a top plan view of the fire-box walls of a furnace, the upper portion of the walls being broken away and Fig. 2 is a similar view-with the arch-blocks in position to form an arch from one side wall or jamb to that on the opposite side of the firebox. Fig. 3 is a front elevation of the parts as shown in Fig. 2. Fig. i is a top plan view similar to that shown in Fig. 2, showing the arch-blocks shorter than those shown in Fig. 2. Fig. 5 is a view in isometrical perspective of one of the arch-blocks detached. Fig. 6 is a similar view of the other arch-block detached.

The objects of my invention are to secure the front end blocks or jambs of the side walls to the arch-blocks in such a way that they will not be easily displaced by a hook in the hands of the fireman when drawing clinkers from the fire-box, the arch-blocks and jamb-blocks the walls and in line with the arch, as will be hereinafter more fully described and subsequently pointed out in the claims.

Referring to the drawings, 1 represents the casing, which may be made of cast-iron or other suitable material, which is filled in with fire-brick 2 to form the side walls of the firebox.

The forward ends of the side walls are usually made of a single block or large brick 3, called a jan b, which is expanded or made wider at its outer end to form the contracted opening 4 beneath the arch, through which coal is inserted and clinkers frequently removed from the fire-box.

The arch is formed by two arch-blocks or large fire-bricks 5 and 6, adapted to be placed upon the top of the front ends of the side walls or jambs in sucha manner that their inner ends will meet over the middle of the contracted opening 4. The contacting edges of these blocks are preferably provided with a tongueand groove connection, the tongue being shown on the block 5 and the groove in the block 6, adapted to receive such tongue; but it is immaterial which block has the groove and which has the tongue.

The arch-blocks are shown provided on their lower surfaces each with a groove 7, adapted to receive a tongue 8 on its supporting block or jamb. It is also obvious that the tongue may be located on the arch-blocks and the grooves in the jambs, it only being essential that the tongues and grooves shall extend transversely of the side walls and lengthwise of the arch, so as to permit the arclrblocks to slide toward each other, provided they are not long enough to fill the whole space between the oppositely-located side walls of the case i, the tongue and grooves being arranged longi tudinally of the arch.

The arch-blocks can be moved toward each other until they meet over the center of the subjacent opening and the space remaining between the outer ends of the arch-blocks and the case-walls can be filled in with pieces of brick, fire-clay, cement, or other refractory material, thus making a strong and durable arch and making it possible to use arch-blocks of the same length for furnaces differing in width, thus avoiding the necessity of having a different set of molds for every difl'erent size of furnace to make the required archblocks. Such a connection between the arch blocks and the jambs prevents the possibility of twisting the jamb-blocks when drawing clinkers from the lire-box and renders the connection much more stable than could be had without such tongue-and-groove connection between the blocks.

In Fig. 4 the space between the outer end of one of the arch-blocks and the neighboring case-wall is shown filled with cement 9. The similar space between the other arch-block and case-wall is shown with a filling which may be broken brick 12 and cement or any known filling material, as hereinbefore specilied. The upper part only of the front wall of the ash-pit 14 is shown in Fig. 3, thelower part being broken away for convenience in illustration.

hat I claim as new, and desire to secure by Letters Patent, is

1. A front arch for furnaces, comprising oppositely-disposed side walls and a pair of arch-blocks, supported by the side walls respectively, meeting each other midway between the walls, and forming an arch, and tongue-and-groovc connections between the arch-blocks and walls extending in line with the arch, substantially as described.

2. 1n a front lire-box arch, the combination with the oppositely-disposed jambs; of a pair of arch-blocks; tongue-and-groove connections between such blocks and jambs, respectively, extending transversely of thejambs and in line with the arch, substantially as described.

3. The combination with the jambs of a firebox; of a pair of arch-blocks; a tongue-andgroove connection between each block and its supporting-jamb extending in line with the arch; and a tongue-and-groove connection between the meeting ends of the arch-blocks, substantially as described.

4:. In a front fire-box arch, the combination with the oppositely-disposed jambs; and outer case-walls; of a pair of comparatively short arch-blocks; a filling material between the outer ends of the arch-blocks and the casewalls; and a tongue-and-groove connection between each block, and its supporting-jamb extending in line with the arch, substantially as described.

1n testimony whereof I have hereunto set my hand this 4th day of January, 1905.

JOHN H. FOOTE. lVitnesses:

("iECL A. lVIoSIiriR, E. M. ORIQILLY. 

